Childhood multiple sclerosis treated with plasmapheresis.

We report a case of multiple sclerosis in a 7-year-old boy. He experienced three episodes in 8 months and was repeatedly treated with a high dose of methylprednisolone. During the third episode, to avoid the side effects associated with frequent high doses of steroid, we substituted plasmapheresis for methylprednisolone, initially performing it for 3 days and continuing it every 2 to 3 weeks according to the fluctuating values of antinuclear antibody. The patient improved markedly after initiation of plasmapheresis and has been relapse-free for more than 18 months. The effectiveness of plasmapheresis for treatment of multiple sclerosis in adults is variable and has seldom been reported in children. Our case suggests that plasmapheresis as an alternative therapy is useful for steroid-dependent or severe types of multiple sclerosis even in childhood, especially when its chronic course is assessed by antinuclear antibody titers.